Key telephone set



FIGS. 1 and 2 are respectively top and bottom plan views of a key telephone set showing our new design;

FIGS. 3 and 4 are respectively front and rear elevational views thereof;

FIGS. 5 and 6 are respectively left and right side elevational views thereof; and

FIG. 7 is a front, bottom, and left side perspective view of the handset spaced apart from the stand, and a front, top and right side perspective view of the stand. 

The ornamental design for a key telephone set, as shown and described. 